///author: create by SunJH
///时间: 2021/12/16 0016
///邮箱: 965989158@qq.com
///描述: 工具
///

class Util{
  Util();
  static Future<Util> getInstance() async{
    return Future.delayed(Duration(seconds: 3),()=>Util());
  }
  printInfo(dynamic info){
    print(info);
  }
}